CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). Google's CAPTCHA/bot-scoring widget, the most widely deployed CAPTCHA by far. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| harpercollins.com | #10,795 | Adobe Fonts, Adobe Fonts (Typekit), Attentive + 14 more | Find emails |
| kangtotoberjaya.biz | #10,797 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| palmonas.com | #10,798 | Amazon Route 53, Cloudflare edge/CDN, Convert + 14 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| moonactive.net | #10,809 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| gofund.me | #10,814 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 8 more | Find emails |
| fieltorcedor.com.br | #10,875 | Amazon Route 53, Bootstrap, Django + 6 more | Find emails |
| kmv.ru | #10,893 | Apache, ConsentMo, Font Awesome + 12 more | Find emails |
| dexcom.com | #10,912 | Amplience, Cloudflare edge/CDN, Google Cloud DNS + 9 more | Find emails |
| nt.technology | #10,926 | All in One SEO, Font Awesome, Google Tag Manager + 11 more | Find emails |
| nola.com | #10,936 | DoubleClick (Google Ads), Google Fonts, Google Publisher Tag + 5 more | Find emails |
| airwallex.com | #10,940 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| regway.com | #10,978 | Apache, Cloudflare, Modernizr + 3 more | Find emails |
| e1.ru | #11,063 | DDoS-Guard, Let's Encrypt | Find emails |
| likee.com | #11,067 | Amazon Route 53, Kong, Nginx + 2 more | Find emails |
| auswaertiges-amt.de | #11,081 | Google Maps, Meta Pixel, Twitter/X Widgets + 3 more | Find emails |
| ada.org | #11,097 | ASP.NET, Adyen, Azure API Management + 21 more | Find emails |
| paramount.com | #11,098 | AOS, Bootstrap, DigiCert + 7 more | Find emails |
| kqed.org | #11,104 | Adyen, Amazon Route 53, Brightcove + 19 more | Find emails |
| weglot.com | #11,142 | AWS Lambda, Amazon Route 53, Axeptio + 11 more | Find emails |
| proboards.com | #11,143 | Envoy, Fastly, Google Cloud DNS + 4 more | Find emails |
| ncsl.org | #11,164 | ASP.NET, Adyen, Bootstrap + 25 more | Find emails |
| tenjin.io | #11,190 | Amazon Route 53, Let's Encrypt, LiteSpeed | Find emails |
| flagcounter.com | #11,198 | Apache, Let's Encrypt, jQuery + 1 more | Find emails |
| nextersglobal.com | #11,243 | Amazon (ACM), Amazon Route 53, Bootstrap + 7 more | Find emails |
| optimumdesk.com | #11,259 | AOS, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
Showing the first 10,000matches — add a filter to narrow.
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →